Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83a77e13ed7c622…

MALICIOUS

PDF

42.0 KB Created: 2020-04-17 23:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 11ea92fe8f7b548db87cd9fbf049f53d SHA-1: 61cca0a912265effa6c78a50e04d43f3035706d8 SHA-256: a83a77e13ed7c622b567385b6574dcef818d6e6c5be554785f33d7e88acb0b16
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. These links appear to be part of a link farm designed to trick users into clicking them, likely leading to further malicious content or downloads. The presence of a 'download button' lure reinforces this malicious intent.

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://comstar.pl/uploads/1/3/0/3/130313057/130313057.html#odia+movie+song+mp4++2019
    • http://tricitycreative.com/uploads/1/3/0/2/130272648/21cf9f7991b1.pdf
    • http://smpleecleaning.com/uploads/1/3/1/3/131398234/1c7f36702ffb6eb.pdf
    • http://vadervanodin.com/uploads/1/3/0/6/130620773/zinuwesatesamodiv.pdf
    • http://housekeysproperties.com/uploads/1/3/0/6/130621853/6028750.pdf
    • http://dananny.com/uploads/1/3/0/6/130604767/4487722.pdf
    • http://greenwoodstem.com/uploads/1/3/0/9/130969580/lisagalajunimu.pdf
    • http://ceotitanium.club/uploads/1/3/0/9/130969974/6135598.pdf
    • http://ceotitanium.club/uploads/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000661a.bin
c3700fb4af91d92ecf7985b3e5b6853ae7424990a9c883f2a042a61b66bf904e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661A 9336 bytes
font_01_sfnt_off00008800.bin
3185a149154b42fc0f0995d8d75acfacb8881b89e376020fd42fc37495f8b4c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8800 6472 bytes

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